Paper-bag machine



(No Model.) 4 Shets-Sheet 1.-

W. G. GROSS.

PAPER BAG MACHINE.

No. 243,858. v Patented July 5, 1881.

N PETERS. Mlilhog'wher. Wnhinflon ILC.

No Model.)

4 SheetsSheet 2.

W. G. CROSS. PAPBR'BAG MACHINE.

Patented July 5, 1881.

N. PETERS. Phoiu-Lilhvg aplrer. Washingmn. D. C.

(No Model.) 4 Sheets-Sheet 3.

v w. 0. (moss.

PAPER BAG MACHINE. No'. 243,858 Patented July 5, 1881.

Fig.4.

(fittest.- 4 [Mend-0r N4 PETERS. Phala-ljlhugmphon Washinglon. D. c.

(No Model.)

4 Sheets-Sheet 4. W. 0. GROSS. PAPER BAG MACHINE.

No. 243,858. Patented July 5,-1881..

[raven/tor.-

N. PETERS. FhnlwLilho m her. Wzuhinghu. D. C.

I UNITED STATES PATENT O FICE.

WILLIAM G. CROSS, OF BOSTON, MASSACHUSETTS.

PAPER-BAG MACHINE.

SPECIFICATION forming part of Letters Patent No. 243,858, dated July 5,1881.

Application filed May 17, 1881.

To all whom it may concern.-

Be it known that I, WILLIAM 0. (Ross, of Boston, Massachusetts, haveinvented certain new and useful Improvements in Machinery for MakingPaper Bags, of which the following is a specification.

My invention relates to machinery for making satchel-bottom paper bags,and has particular reference to that portion of the machinery by whichthe second and the third or final folds of the satchel-bottom are made.

The characteristic feature of my invention mainly resides in theemployment, for the purpose of making these two folds, of a pair ofrotating power-driven rolls, the one carrying two clamping-jaws and theother two blades, the two rolls running in contact, or substantially so,and the jaws and blades carried by them being so positioned with respectto one another and to the diamond-folded blank passing between the rollsthat the jaws and their co-operating blades will successively meet onthe blank along the proper lines of fold, and will coact to make thelast two folds of the satchel-bottom as the blank passes along betweenthe rolls. I in this way reduce to the minimum the number of workingparts required to make the last two folds, simplifying and reducing thecost of the machine, and obtaining a mechanism accurate in operation andcapable of doing rapid work.

The nature of my invention and themanner in which the same is or may becarried into effect will be understood by reference to the accompanyingdrawings, in which Figure 1 is a sectional side elevation of so much ofmachine as is needed for the purpose of explaining the invention. Fig. 2is a like view of the same parts, with the folding-rolls in a positiondifferent from that which they occupy in Fig. 1. Fig. 3 is a like viewof the folding-rolls in a position different from those in which theyare shown in Figs. 1 and 2. Fig. 4 is an end elevation of the rolls,their supporting-frame, and the cams attached thereto for actuating thejaws and blades carried by the rolls- Fig. 5 is a modificationhereinafter referred to. I have in Figs.1, 2, and 3 omitted, for thesake of olearness,the gearing by which the rolls are driven and theframe in which they are supported, these devices being within (Nomodel.)

the knowledge of the mechanic and unnecessary to an understanding of myinvention.

A A are paste-rolls, to which the diamondfolded blank, with diamond folduppermost and in front, is delivered in any suitable manneras, forinstance, from a diamond-iold-forming mechanism operating upon the planset forth in my Letters Patent No. 221,531, of N ovem ber 11,1879. Thepaste-roll A is made, as customary, with central paste ribs or ridges,as shown in my Letters Patent No. 239,457, of March 29,1881, suppliedwith paste from a suitable source, and acting to deliver paste in theusual way along the proper lines on the diamond of the blank. The blankis by the rolls A Apasted and fed along over the table A to thefolding-rolls B O, which I shall now proceed to describe.

The roll B carries two clamping-jaws, a a, counterparts of one anotherin construction, but timed differently as to their movements. Jaw (1acts on the front flap, w, of the blank 'L0 to make the second fold. Itis mounted on a rock-shaft, b, in arecess, c, in the roll B, and isintended to move to and from the side d of said recess, which is ineffect a stationary clam ping-surface, against which the jaw pressesthat portion of the blank tucked down between them by theblade,hereinafter described. The rock-shaft 1) projects from one end ofthe roll B, and onits projecting end is mounted acrankarm or stud, e,which is acted on by a stationary cam, f, fixed to the frame K of themachine, as indicated in Fig. 4, and preferably adjustable thereon. Thecam holds the jaw open, and is so formed that at the proper time it willpermit the arm 6 to clear it, thus releasing the jaw, which, by thestress of a spiral spring, g,encirclin g its rock-shaft, as indicated bydotted lines in Fig. 4, and attached at one end to said shaft or jaw andat the other to the roll, is caused to at once close against thestationary clamping-surface d.

In the roll (J is mounted a blade, h, which co-operates with the jaw a.This blade is mounted in a radial recess in the roll 0, and preferablyis capable of sliding back and forth therein, being pushed outward by aspring or springs, i, and moved inward against the stress of said springor springs by cams j, fixed to the frame of the machine, (preferably inan adjustable manner,) as indicated in Fig. 4, which act on frictionstuds or rollers 7c, one at each end of the blade.

The rolls B 0, one or both, are mounted in spring-boxes, so that theyshall bear against one another with yielding pressure in order to adaptthemselves to the varying thickness of the blank passing between them.They revolve at the same peripheral speed, and are so placed and timedthat during their rotary movement the clamp-jaw a and blade It will meetat the time when the blank has entered far enough between the roll tobring the front flap, :0, between them on the proper line of fold. Thecamsfi are so placed that at the time the clamping-jaw a and blade itcome oppositeone another the blade protrudes from its roll, and thejawis open, so that the blank will tuck a portion of the front flap, or,along the proper line of fold down in the bite of the jaw, as indicatedin Fig. 1, just at the time the latter is about to clear its cam.Further rotary movement of the rolls causes the blade to be lifted bythe cams j simultaneously with the release ofthejaw from the influenceof its camf, and the jaw will thus close tightly on the blank and carryit around until caused to release hold thereon by the cam, as indicatedin Fig. 2. In the interim the jaw, as seen in the figure, has carriedthe bag around far enough under a wiper cross-bar or idle-roll, D, towipe back and down the front point or flap, or, along the line of fold,thus completing the second fold, and it releases its hold upon thefolded front end of the bag in time to permit that end to rise or standaway from the periphery of the roll B far enough to pass above a secondwiper cross-bar or idle-roll, E, which is used as a convenient adjunctto complete the third or final fold.

In rear (relatively to direction of feed) of the jaw a is a second jaw,a, hereinbefore referred to. This jaw and its adjuncts I) 0 61 e f arecounterparts of jaw a and its adjuncts b c d cf, and there is combinedwith said jaw also a spring similar to spring g. The cam f is, however,placed on the side of the machine opposite to that on which cam f isplaced, and arm 6 projects from the end of theroll opposite to that fromwhich arm 6 projects. (Jam f is also shorter than camf, so that the jawa may retain its hold on the blank for a longer time than does the jawa.

In the roll 0, and intended to coact with jaw a, is a blade, h, withadjuncts 1" 70'', similar to blade, h and adjuncts i 70, alreadydescribed. The studs are acted on by the same cams, j, which influencethe studs it. These devices a h are placed at such a distance in rear ofthose devices a h already described that they will meet at a time whenthe blank w has passed far enough along between the rolls B G to bringsaid parts a h opposite the proper line of fold on the rear flap, y, ofthe diamond fold. The blade h tucks the rear flap of the diamond alongthis line down into the bite of the jaw a, as seen in Fig. 2, tuckingalong with it, also, the underlying body of the blank, and then israised by cams j just as the jaw, released from the influence of the camf, closes upon the part tucked between it and the face 61. By thecontinued movement of the rolls the blank is carried around that portionof the blank in front of the point where thejaw a has its hold, beingdeflected or shunted ofi' away from the roll B in the space between'thewipers D E until jaw a, still holding the blank, travels under and pastthe lower wiper bar or roll, E, as indicated in Fig. 3, which has theeffect of folding back and down upon the body of the bag, in rear of thepoint where it is held by the jaw, that part of the blank in front ofthat point, as shown in the figure referred to, thus in effect doublingthe bag upon itself and in ak ing a blind fold therein, but at the sametime folding down the third or final fold, pressing all the folds, andvirtually completing the satchel-bottom. Thejaw a retains its hold onthe blank until nearly reaching the position shown in Fig.1, at whichtime its cam f opens it, thus releasing the blank, which drops from thefolding mechanism upon the upper end of a carrier, F, and is by thatinstrumentality conveyed to the drier. The carrier arrangement shownserves to straighten out also the blind fold in the bag. That fold ofthe bag which is doubled back upon the body natu rally opens, thuscatching over the upper end of the carrier shown in Fig. 1, and thefold, as the bag is carried along, naturally straightens out, as seen inFig. 2.

It will thus be seen that by the employment of two rolls onlythe onehaving the pair of spring and cam controlled clamping-jaws and the othera pair of coacting blades-i am enabled at each revolution of said rollsto make on a diamondfolded blank passing between them the last two foldsof the satchelbottom. This improvement renders it feasible for me toemploy but three rolls for the purpose of making both the diamond foldand the last two folds ofa satchel-bottom. A mechanism adapted to obtainthis result is shown in Fig. 5 in sectional side elevation. Likelettered parts in this figure represent correspondingly lettered partsin the figures hereinbefore described. The clamping-jaw andblade-carrying rolls B O are, in so far as concerns the making of thesecond and final folds of the satchel-bottom, the same as those alreadydescribed; but the roll B possesses in this case the additionalcharacteristic of being one of a pair of dia mond-fold-forming rolls, ofwhich the other is shown at G. This roll Gr is provided with a vibratorynipper, l, and the roll B is provided in advance of the second-foldclamping-jaw a with a like nipper, l, the two being controlled bysprings and cams m m, and constituting in effect a pair ofdiamond-fold-formin g cylinders or rolls, constructed, arranged, andoperating to make the diamond fold, as shown and described in my LettersPatent No. 239,457, of

March 29, 1881. It will be understood, of

course, that I use, in conjunction with said rolls, elastic or yieldingopening fingers or their equivalent, as specified in said LettersPatent, for the purpose of opening the mouth of the blank to permit thenippers to enter therein and take hold of the plies. The rolls rotate inthe direction indicated by the arrows and move at the samesurface-speed. The nippers l L are shown as about taking hold of plies 11 of the blank. Continued movement of the rolls causes the nippers toclose on these plies, the blank thus held being drawn along between therolls, and its mouth endbeing gradually spread apart by the two movingdivergin g surfaces on which its plies are held. The cams m m are soadjusted that the nipper l on roll G releases its hold before the nipperl on the roll B does. The latter retains its hold on the blank, carryingthe point which it holds of the diamond fold thus partially formed alongbetween roll B and the presser and paste roll A, which presses out thediamond fold and deposits the two lines of paste thereon, as usual.After carrying the blank along still farther until the point of thediamond has entered between the rolls B C the nipper releases the blank.The clamping-jaw a is at such a distance in rear of nipper l that itwill be under that part of the front flap of the diamond opposite theline of fold for the second fold, and the two rolls B 0, after the blankhas entered between them, act on it with their jaws and blades a a h hin the manner hereinbefore described, the completed bag, after itsfolded part passes the last wiper, E, being directed 0E and dischargedfrom the machine by any appropriate means.

It will thus be seen that a roll provided with a nipper or equivalentply-grasping device and a pair of clamping-jaws coacts, on the one hand,with a roll having a similar ply-grasping device to make the diamondfold, and on the other hand with a roll carrying a pair of blades tomake the second and the third or final folds, and that consequently I amenabled with three rolls to make a satchel-bottom.

In the drawings 1 have shown, in connection with the clamping-jaws,light spring-lifters a, which are seated in recesses in the roll B, being fastened at one end therein and extending crosswise of the jaws, inwhich are notches, which will permit these strips to be depressed by theblades below the acting faces of the jaws. It is the function of thesestrips to lift and disengage from the recesses c in the rolls the blankas soon as it is released from the jaws. These devices, however, are nothere claimed, inasmuch as they form part of another application by mefor Letters Patent. I also, as shown in Fig. 4, make notches at o 0 inthe blades, the object of this being to prevent the blades from comingin contact with the lines of paste on the face of the diamond fold.

Having described my improvement, what I claim, and desire to secure byLetters Patent, ls-

1. In machinery for making the second and final folds of asatchel-bottom on a diamondfolded blank, the combination of a rotatingjaw-roll and two spring and cam controlled clampingjaws carried by thesame with a blade-carrying roll provided with two blades, adaptedto'coact the one with one clampingjaw on the leading flap of thediamond, the other with the other clamping-jaw on the rear flap of thediamond, these parts being combined and arranged for joint operationsubstantially as hereinbefore set forth. v

2. The combination of the clamping-jaw roll, the two vibratoryclamping-jaws carried by the same and actuated to move substantially asdescribed, the blade-roll, the two blades carried by the same, and thewiper cross bars or rolls, the combination being and actingsubstantially as hereinbefore set forth.

3. The combination, substantially as hereinbefore set forth, of theclamping-jaw roll and the two spring and cam controlled jaws carried bythe same, the blade-roll and two blades carried by the same, the wipercross bars or rolls, and the carrier.

4. The clamping-jaw roll provided with a ply-grasping nipper and twoclamping-jaws, arranged and operated to move substantially at the timesand in the manner described, in combination with a nipper-roll andvibratory nipper carried by the same, co-operating with saidclamping-jaw roll to make the first or the diamond fold, and ablade-roll carrying two blades, arranged to co-operate with the jaws onsaid clamping-jaw roll to make the second and the final folds,substantially as hereinbefore set forth.

'5. The combination, with the clamping-jaw and nipper-roll carryingclamping-jaws and a nipper arranged and operated to move at the timesand in the manner substantially as described, of the nipper-roll andblade-roll and their adjuncts and the paste-roll, substantially ashereinbefore shown and set forth.

6. The combination, substantially as hereinbcfore set forth,ofnipper-roll Gr, clamping-jaw and nipper-carrying roll B, and paste-rollA, blade-carrying roll 0, and wiper bars or rolls D E.

In testimony whereof I have hereunto set my hand this 10th day of May,A. D. 1881.

WILLIAM C. GROSS.

Witnesses:

E. A. DICK, N. 0. LANE.

